高烈度区平面狭长的竖向细高结构方案比选

Scheme comparison of long and narrow plane of vertical slender height structure in highly seismic region

高烈度区平面狭长的竖向细高结构的工程设计难度大,选择合适的抗侧力结构体系至关重要。针对海口某高层结构,基于钢筋混凝土框架-剪力墙、钢筋混凝土剪力墙、钢框架、钢管混凝土框架-钢板组合剪力墙四个结构方案,采用YJK和Perform-3D软件对比分析了各方案的动力特性、小震作用下的弹性响应、大震作用下的弹塑性响应及抗震性能,对比分析了四个结构方案的经济性和舒适性。结果表明:除钢筋混凝土剪力墙方案小震层间位移角略大于限值外,各方案均满足小震和大震层间位移角限值要求,钢框架、钢管混凝土框架-钢板组合剪力墙方案在地震作用下底部剪力和地震输入总能量显著减少且构件延性更优;钢管混凝土框架-钢板组合剪力墙结构方案的经济性最好、建筑的净使用面积最大、梁下净高最高、工期更短,达到了装配式建筑要求。

It is crucial to design long and narrow plane of vertical slender height structures in highly seismic region,so it is very important to select suitable lateral force resistant structure system.For a high-rise structure in Haikou,based on four structural schemes including reinforced concrete frame-shear wall,reinforced concrete shear wall,steel frame and concrete-filled steel tube frame-steel plate combined shear wall,YJK and Perform-3D software were used to compare and analyze the dynamic characteristics,elastic response under small earthquakes,elastic-plastic response under large earthquakes and seismic performance of each scheme.The economy and comfort of the four structural schemes were compared and analyzed.The results show that the interlayer displacement angle for small earthquake of reinforced concrete shear wall scheme is slightly larger than the limit,and all schemes meet the limit of interlayer displacement angle for small earthquake and large earthquake.The bottom shear force and total input energy of steel frame,concrete-filled steel tube frame and steel plate composite shear wall schemes are significantly reduced under earthquake,and the ductility of the components is better.The concrete filled steel tube frame-steel plate composite shear wall structure has the best economy,the largest net use area of the building,the highest net height under the beam,and the shorter construction period,which meets the requirements of prefabricated building.